// 生成用户的临时身份的唯一标识  UUID
import { v4 as uuidv4 } from 'uuid';

export function userTempId(){
    //先从本地存储获取 userTempId
    let result = localStorage.getItem("userTempId");

    if(result){
        //若拿到userTempId ，直接返回
        return result;
    } else{
        //重新生成
        let newUserTempId= uuidv4();
        //本地存储  数据
        localStorage.setItem("userTempId",newUserTempId);
        //返回新生成的 newUserTempId
        return newUserTempId;
    }
}